#define LDR_PIN 4
#define LED_DARK 2
#define LED_LIGHT 19

int threshold = 500;

void setup () {
  pinMode(LED_DARK, OUTPUT);
  pinMode(LED_LIGHT, OUTPUT);
  Serial.begin(9600);
}

void loop () {
  int ldrValue = analogRead(LDR_PIN);
  Serial.println(ldrValue);

    if (ldrValue < threshold) {

      digitalWrite(LED_DARK, HIGH);
      digitalWrite(LED_LIGHT, LOW);
    }
    else{
      digitalWrite(LED_DARK, LOW);
      digitalWrite(LED_LIGHT, HIGH);
    }

    delay(200);

}